Isabelle de Beauvau or Isabeau de Beauvau was a French noblewoman, of the Beauvau family, lady of Champigny and de la Roche-sur-Yon, countess of Vendôme by her marriage. She is the trisaïeule of King Henry IV of France and Catherine de' Medici, her great-granddaughter.
Early life
Isabelle was the only child of Count Louis de Beauvau and his first wife, Marguerite de Chambley, a woman of noble birth from Lorraine. Isabelle's lineage made her valuable to René of Anjou, who was dealing with a succession crisis over the duchy of Lorraine. He was trying to strengthen ties with Lorraine's nobility which is why her name appears with those of her mother and Yolande, Duchess of Lorraine, in a handwritten collection of poems by Alain Chartier offered to Marie de Clèves. Other than that not much is known about Isabelle's childhood; her marriage negotiations started before she was eighteen and she was raised a catholic. She had one half-sister, Alix de Beauvau, who was legitimized when her father remarried.
Marriage and becoming Countess
Isabelle married John VIII, Count of Vendôme, on 9 November 1454 at Angers, thus becoming the Countess of Vendôme. As a courtier of King Charles VII of France, her husband he fought the English in Normandy and Guyenne leaving her to supervise the council and oversee the royal affairs she went into confinement many times and met many women during those times and was therefore favored by the women of lavardin she and her husband had a good relationship and had eight children:
Jeanne ; in 1478 she married Louis de Joyeuse ;
Catherine, married in 1484 to Gilbert de Chabannes, seneschal of Limousin;
Jeanne de Bourbon in 1487 Jean II of Bourbon, 2) in 1495 Jean IV of Auvergne in 1503 François de La Pause, baron of La Garde;
Renée, abbess of the Trinity of Caen from 1491 to 1505, then from Fontevrault from 1505 to her death;
Charlotte, married to Engilbert de Clèves, count of Nevers ;
Isabelle, abbess of the Trinity of Caen from 1505 to 1531
Death and legacy
Isabelle died giving birth to her last daughter. She is buried in the Saint-George collegiate church in Vendôme, the Bourbon Vendôme necropolis, which has since disappeared. Through her third daughter she was great grandmother to the French nobility. She is most remembered for the poem by Alain Chartier to Marie of Cleves.